Serpentine structure for a turnstile

Details Serpentine structure for a turnstile Serpentine structure for a turnstile

1993-08-20

1994-09-13

Kannan, Philip C.

Movable or removable closures

Plural wings radiate from common pivot; i.e., revolving

E05D 1502

Patent

active

053457153

ABSTRACT:
The invention is a turnstile gate with a serpentine configuration instead of conventional protruding arms. Both the stationary and revolving gates are formed of a continuous configuration of pipe which loops back and forth with substantial straight sections oriented horizontally. In order for the movable gate to pass through the stationary gate, the loops of the stationary gate must be offset from those of the revolving gate by one-half a cycle, and the loops of at least one of the gates must vary in their heights so that they can be located both outside and inside of the loops of the opposing gate. The advantages of the configuration are safety, ease of manufacture and greater strength, with a unique aesthetic appearance.

REFERENCES:
patent: D188191 (1960-06-01), Stevens et al.
patent: 492353 (1893-02-01), Gott
patent: 985544 (1911-02-01), Perey
patent: 2258896 (1941-10-01), Kelker, Jr.
patent: 2309893 (1943-02-01), Gersbach
patent: 2603333 (1952-07-01), Richey
patent: 3019539 (1962-02-01), Dolman
patent: 3839825 (1974-10-01), Nica
patent: 4047330 (1977-09-01), Gustafsson
patent: 4184289 (1980-01-01), Lambertson
patent: 4472909 (1984-09-01), Levy-Jospeh
patent: 4989368 (1991-02-01), Trikilis

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